Taper-gaging caliper



F. G. BENTON.

TAPER GAGING CALIPER.

APPLlcATmN HLED ocr. 27, 1919.

41,389,38 1 Patented Aug. 30, 1921.

` the device and yacross the oi Unirse siAr/ss PATENT OFFICE.

FRANKLN G, BENTON, F PROYDENCE, RHODEISLAND.

'rarita-enorme CAL-iran.

Specifica-tion Application filed October 2 Y improved micrometer caliper lor measuring or gaging tapere pieces having opposite angular faces. The Y object oi my improvement is to provide ya iiieasuiing tool orinst'rument adapted .'or calipering a tapered piece ata plurality o'l spaced apart points along its length, whereby to measure or gage its taper inproportion to any ixe'dunit ci linear measurement. `To l this end my improveddevice consists esseny pairs ot opposite gaging-eletially in two ments or points which are adjustable to caliper the sides 'ot the piece to be measured., while-being.held` 'in constant relation laterally in accordance with a fixedunit ot linear measurement. v

he invention is lowing specification,

cempanynig drawings,

illustrated by -the acin which like reference characters designate like parts. ln the drawings: Y

Figure l is a sideview oione embodiment oi the invention;

Fig. 2, a plan view Fig. 3, a` transverse, sectional set of opposite measuring-p iiits o the caliper, showing the connecting linlr which maintains them at a lined distance apart;

Fig. Li, a longitudinal sectional view ci one oi the adjustable `calipering-spindles, showing the method ot pivoting the g'agingpoint thereto Y vFig. 5, a detail view ci the angular elbowmember ing-spindles in oliset relation to the frame oit the instrument;

Fig. 6,' a side view et the same;

view of one Fig-:7, va plan view ot the same.

`Beierring tirstto VFigs. y drawings, 2 designatesa U-shaped frame or yolre having bea-rings 3 and l for two ot the calipering-elements. Secured in theV letthand bearing i2 isa niied iening oi. .the trame 2, being rounded oftat its end to adapt it to engage theside oi kthe piecevto be calipered. Ar-

of Letters iatent.`

liully described in the iolthe spindle `in itsbearingl.

proximate adjustment is made in this maniii-placev en the 5 it may;

which supports one ot' the caliper-Y y tinuously of a modified 'orm of l and 2 ot theV calipering-spindleV or anvil 5 whichproiects therefrom' partly.. n

vtiie usual construction pers. At the` outer end of the'spindle 2O isv 'Patented Aug. 30, 15921;. '7, i919. serial No. 333,675. y

ranged in axial aliiiement with the xed anvil V5 is an adjustable calipering-spindle 6 whichfisslidable through a bore in the bearing i. The spindle 6 projects to the lett of the bearing i andV is Jorinedwith a rounded end which cooperates with the end2 ot the anvil 5 in calipering the piece to be measured. The right-hand end of thespindle 6 isitted to a` bore in an elbow-shaped member 8 and secured therein by a set-screw 9, see Fig. 5. The member 8 is mounted to slide aloiiga rod or arm lO projecting horizontally from the side o the frame 2, see Fig. l, and it may be fastened in itsY adjusted position thereon ll at its-bottomv by means of a .thumb-screw adapted to bind' against the rod. right ot the member is also adi ustablealong the rod l0 and adapted to be secured in fixed' position. thereon by means ot. a thumb-screw y13. A relatively fine pitch screw l/lreaches` out trom the side oi' the meinberS and projects through a bore in the collar l2. Y The top of the collar l2 is 'or triangular shape, as shown Fig. 5, and is slotted vertically at l5, see Figs. l and 55, to a lapt it to receive a knurled nut 16 which engages thethreads on the screw le; In setting thespindle 6 in relation to the fixed anvil 5 the thumb-screws l i3 arereleased and the member 8 and collar may then be slid alongthe rod VlO to slide Atl the ner thecollar l2 I rod l() by means ot its thumb-screw i3, and

a liner and more accurate adiustment o the spindle 6 may be accomplished by turning the kmember 8 in either is clamped the nutl i6 to slide direction. ritter the spindle 6 has once been set in relation tothe fixed vspindle or anvil instrument is to,l beused connient, when the by tightening the setas a. gage, screw ll. p

Gii'set i'rem the side oi' the adjustingmeniberS is an arm 1S carrying a bearing i9 for the auxiliary calipering-spindle vQOwhich vis arrange li in parallel relationwith the ad- The-bearing 19 is pro-V justable spindle 6.

vided with sleeveV or barrel 2l projecting -roin its Vright-handA end' and `formed vwith a engaged bv corresponding threaded bore Athreads on the spindle 2O in accordance with ci Vmicrometer cali'- a sleeve or thimble 22v provided withk a 8 is ay collar l2 ,which il and y be .secured in permanent adjustritter an apf a vernier. n rranged opposite to and in axial alinement with the ing-spindle 26 ing 27 formed on or attached in offset relation to the left-hand framebearing 3, see Fig. 2. screws through a barrel 2S, projecting to the left from the bearing 27 arrangement as embodied in the right-hand spindle 20.

end for the swinging gaging-tips or calipering-points 32 and 33. heferring to Fig. 4, the calipering-points 32 and 33 inay consist of relatively short cylindrical rods formed with rounded ends correspondin semi-spherical ends of the spinde anvil 5. At their opposite ends the sides of the members 32 and 33 are slotted or milled oil" to provide Hat tongues or shanks 34 by which they are hinged 'to t e mountings 35 and 36 at the ends of the and 26. The mountings 35 and gaging-tips or points 32 and 33 are constructed in the form of extensions at the ends o the spindles 2O and 26 and are crossslotted at 37, see

6 and Figs. 2 and 4, to receive the tongues or Shanks 34 of the tips. Extendin through the sides of the slotted ends of the mountings 35 and 36 are cross-pins 38 on which the shanks 34 of the tips 32 and 33 swing on an axis of the The mountings or exspindles 20 and 26,

and 36 are fastened to tensions 35 of tlieiinespective spindles 2O and 26 by l means et axial studs 39 the studs being l 3 are united to by universal-joints,

re ative rotative movement therebetween for a purpose as later explained. Y

xe g now to tig. 2, it is to be noted tips 32 and 33 on the spindles 20 and 26 are connected to their opposite, parallel spindles 6 and 5 by means of cross-links 41. s shown in Fig. 3, the

to the preferably constructed from fiat stock and formed with bifuicated portions or yokes 42 at their' ends. The yokes 42 straddle the sides of the tips 32 and 33 and the spindles 6 and 5 and are pivotally connected thereto by means of cross-pins xeferring to Fig. 2, t e purpose of this cross-connection between the adjustable spindles 20 and 26 and their opposite associated spindles 6 and, 5 is to maintain the ca ipering-points of the instrument at a constant distance apart as regards their lateral relation. The links 4l are pivoted to the tips 32 and 33 and spindles 6 and 5 at points coinciding with t e axes of their ball-shaped ends; and conse uently, when the two adjustable spindles 2O and 26 are moved lonvitudinally toward or away from each other and 33 will be caused to swing' on their pivots 38 whereby to maintain the of their ball-ends links 4l are links 41, is established arbitrarily venien tenth inch taper per inc In Figs. 6 and 7 I have illustrated a somewhat simpler form or" tevice having two fixed spindles or anvils 5 and 45. The opposite spindles 6 and 46 are adjustable in relation to the lixed anvils 5 and 45 .in the same manner as those Vshown in Figs. l and 2, the spindle 46 being provided with vernier scales as is common in other types o' micrometers. In this embodiment of second micrometer spin` dle is dispensed with and only one swiveled urement to the preferred 125 by dash lines in i served that in units of an inch for instance per a ll cause themembers i' left-hand spindle taper required. Y

Fig. 2, to be entered between them. This setting is accomplished by sliding the member S along the rod 10, using the adjusting nut 16 for fine adjustments when required, in the manner as hereinbefore explained. lt will be understood that the adjustment of the member 8 also moves the spindle 2() to the same extent as the spindle 6 so that they retain their normal relation. lVhen the piece B to be measured is a tapered spindle or the like having the same taper throughout its length the spindle'6 may be adjusted to a point where the smaller end of the taper will enter between its end and the end of the anvil 5, and the micrometerspindles 2O and 26 are then adjusted through their sleeves 2l and 28 to set the gagingpoints 32 and 33 against the sides of the piece as shown in Fig. 2. The spindles ZO and 26 are preferably adjusted to the same extent, so that their verniers will read'alike, and thus either reading will indicate the pitch or taper of one side of the piece in relation to its axis, while the sum of the readings will give the included angl tween the two sides vof the piece. measurement of the tapers will be given fixed unit -of linear 'measurement taken on the tapered face whichr is determined by the lateral distance between the Vcaliperingpoints 32 andl 6 orv 33 and 5. rlChis distance -reniains constantas regulated by the connecting links il in the manner as before explained; that is to say, as the caliperingpoints 32 and 33 are moved back and forth toward or away from each other the links 32 and 33 to swing on their pivots 38 so that the axes of their ball-shaped ends are kept at a uniform distance from the axes of the opposite calipering-members 6 and 5. lt will also be obthe links il restrain the mem- 33 from rotation, but the spin- 26 are free to rotate in relation are screwed through 28 as provided by the bers 32 and dles i2() and thereto when they their sleeves 2l and swiveled connection of the mountings and 36 on the axial pins 39.

1When the device is to be used as a rgage in grinding er otherwise finishing worky to a standard taper it is set as follows: rllhe 26 is adjusted in relation to its associated fixed spindle or anvil 5 to set their caliperingor gaging-points tothe The spindle 6 is then set in permanent `relation to the anvil 5 to adapt their ends to caliper the piece at any convenient point. Now, when the piece B is inserted between the' ends of the spindles 5 and 6, with one side in contact with the Yend of vthe gaging-point 33, the opposite saine reading spindle 2O is adjusted to the as the spindle 26 and if the taper of the piece is correct its sides will contact with the gaging-members ,at all four points. t the piece has not been brought to the required taper the right-hand spindle Z0 may be turned to calipering position and the reading of itsV vernici? will indicate the error or variation to guide the operator in the further grinding of the piece.

lil/'ith they type of instrument shown in Figs. 6 and 7 the work is calipered in the saine manner, except that only the one .micrometer spindle i6 .needs to be manipulated after the opposite spindle 6 has been set in fixed position. lt will be understood that in this type-of device the distance between centers of the fixed calipering-points or vanvils 5 and Ll5 remains and the distance between the axes of the gaging-points on the spindles 6 and Lf6 is also maintained constant by thev connectinglink al in whatever relative position of ad-` range of adlenf thwhile constantly maintaining tne calia fixed distance apart in lateral relation during their adjustment against the sides of therpiece. My new device isparticularly simple in construction; easy and Yconvenient of manipulationrand extremely Vaccuratev in use for gaging or measuring tapered pieces and inclined surfaces. Various modifications might be made in the structure and arrangement of the parts; of the device without departing from the spirit or scope of thev invention; therefore, without limiting myself to the embodiments herein shown and described,

what l claim is: y

l. In an instrument for measuring tapered pieces having opposite angular faces, the combination of two pairs of elements for gaging the work at a plurality of points spaced ata predetermined distance apart, said gaging-elements formed with rounded ends to adapt them to Contact with the angular faces at opposite points in a single plane,and means for adjusting the gagingelements against the work while maintaining a constant spaced relation therebetween. ln a caliper for gaging tapered pieces pering-el ements at sides always the same,

of device is Y llO faces, the oombinapairs of associated spindles hav- Y mined distance apart in lateral relation in whatever' position of adjustment they may be set.

3. In a caliper for gaging tapers, the combination with two pairs of spindles for calipering the work at a. plurality of points along its length, of gaging-members movable laterally across the axes of'one pair of the spindles, and means connecting the gaging-members with their laterally associated spindles to maintain the tips oIn the calipering points at a uniform distance apart during their adjustment longitudinally in relation to each other.

4. ln a caliper for gaging tapers, the coirbination with a frame, o two sets of calipering-spindles mounted on the frame, the spindles longitudinally in relation to each other, gaglng-elements necting said gaging-elements posite spindles of the other set to maintain t e calipering-points of the spindles at a constant distance apart longitudinally of the faces being calipered.

n a caliper ter gaging tapers, the combination with a frame, of two pairs of calipering-spindles the frame, means for adjusting the spindles longitudinally in relation to ment swiveled to dles, and a. link pivotally connected to the gaging-elcment with its opposite end pivoted to the laterally associated spindle whereby to maintain the calipering-points of the spincles at a constant dista-nce apart longitudinally of the faces being calipered.

In a micrometer caliper for gaging tapers, the combination with a frame, of two sets of spindles fer calipering the work at a plurality of points along its length, means for adjusting the spindles longitudinally in the frame, Vernier scales for indicating` the extent of adjustment of the spindles, laterally movable calipering-elements on certain of the spindles, and means for regulating the position of said calipering-elements to maintain a predetermined lateral relation between the contact-points longitudinally of the faces being calipered.

7'. ln a caliper for gaging tapers, the combination with a frame, of an arm projecting` from the side of the frame, an adjustingmember movable along the arm, means for securing the member in different positions of adjustment on the arm, a spindle secure-d to said member and adjustable therefrom in with the opthird spindle carried by said adj Listing-memtourth spindle adjustably mounted in the adjusting-member to adapt it for adjustment in relation to the other spindle on the frame.

9. In a caliper for gaging tapers, the combination with a frame having opposite bearings, of a calipering-spindle lixedly mounted in one of the bearings7 a second spindle adjustable in a the first spindle, a third spindle adjustable in a bearing in axial alinement with that of the first spindle, and a fourth spindle acljustable in a bearing in axial alinement with the second spindle. Y

In a caliper for gaging tapers, the combination with a frame, of a fixed calipering-spindle on the frame, an adjustable micrometer-spindle mounted in the frame ffset parallel relation withV the xed spindle, a third spindle longitudinally ad- Y' opposition to the a `fourth spindle 1n parallel relation with the third spindle and adaptedfor micrometer adjustment in relation to the opposite micrometer-spindle.

In a micrometer caliper for gaging tapers, the combination with a frame, of four opposite calipering-spindles arranged in parallel offset relation on the frame, calipering-members swiveled to the ends of two of the spindles, and means for maintaining said members with their' contact-points at a fixed distance from the contact-points of the opposite related spindles.

n a caliper for gaging tapered pieces having opposite inclined faces, the combination of a U-shaped frame and two pairs of opposite measuring-elements adjustable on said frame to contact with the tapering sides of the piece, said measuring-elements arranged in spaced relation at a predetermined distance apart with their axes in a single plane at right-angles to the plane of the frame of the caliper.

In testimony whereof l affix my signature.

FRANKLIN G. BENTON.-

bearing offset `from that otv 

